A micro-comb based terahertz communication system achieves 112Gbps wireless transmission, advancing compact hardware needed for future 6G networks.
(Image credit: Tokushima University)
Researchers in Japan have developed a compact terahertz wireless communication system capable of transmitting data at speeds of up to 112Gbps, marking a significant step toward future 6G network infrastructure.
The breakthrough uses microcomb based photonic technology integrated into a miniaturised chip scale platform. By combining optical microcombs with advanced modulation techniques, the system achieved 112Gbps transmission in the 560GHz terahertz band, a frequency range considered critical for next generation wireless networks.
Current electronic approaches face challenges at such high frequencies due to power limitations and phase noise, which can reduce signal stability and restrict data throughput. The new design overcomes these issues by using optical signal generation techniques that provide higher stability and improved signal quality.
A key feature of the system is the direct bonding of optical fibre to a silicon nitride microresonator, eliminating the precise alignment requirements associated with conventional photonic systems. The resulting transmitter measures just 5mm, making it around 90 times smaller than traditional microcomb based implementations while maintaining ultrahigh speed data transmission.
The researchers also incorporated temperature control within the microresonator to improve operational stability under varying environmental conditions. The technology could eventually support high capacity wireless backhaul networks for 6G deployments, reducing dependence on extensive fibre optic infrastructure.
Takeshi Yasui, Professor at Tokushima University‘s Institute of Post LED Photonics and co author of the study, says, “This result represents a major step toward practical 6G wireless systems and ultra high speed mobile backhaul.”
